As stated International had nothing to do with the Sheppard conversion engine.It was designated model 6M by Sheppard,it was a 3 cylinder,indirect injection Diesel.Sheppard also made 4 models of tractors.The SD-1,SD-2,SD-3 and SD-4.The SD-1 is the rarest of all with production believed to be less than 20.Wendel Kelch ones one of these.SD-2 and SD-4 production was around 200 each.The SD-3 was the most common of the Sheppard tractors wsith production of less than 2000.The 6M conversion engine was designed to fit the M chassis,and had very little in common with the SD-3 tractor engine.About the only interchange of parts were the pistons and injectors.Block,heads,crank,inj. pump,etc. were different from the SD-3 engine.The early 6M conversions actually used a timing chain and the later ones had gears.Sheppard never Nebraska tested their tractors,so hp estimates are sketchy.Sheppard rated their tractor as "2 plow" or "3 plow"or "4 plow" tractors.The story is the SD-4 was sent to Nebraska for testing to try to compete with the John Deere 70 for sales.Supposedly the Sd-4's hp. numbers would't compare to the JD,so it was withdrawn from the tests and never certified.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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